CN113467323A - Vacuum baking oven control system and control method for different negative pressure values - Google Patents
Vacuum baking oven control system and control method for different negative pressure values Download PDFInfo
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- CN113467323A CN113467323A CN202110830322.9A CN202110830322A CN113467323A CN 113467323 A CN113467323 A CN 113467323A CN 202110830322 A CN202110830322 A CN 202110830322A CN 113467323 A CN113467323 A CN 113467323A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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Abstract
The invention discloses a vacuum baking box control system and a control method for different negative pressure values, and solves the problem that the power consumption is large because a vacuum baking box system cannot be reasonably configured in the prior art. The invention comprises a plurality of vacuum baking boxes, a low-pressure pipe and a constant-pressure pipe, wherein the outlet end of each vacuum baking box is connected with a first pipeline and a second pipeline; the vacuum unit comprises a plurality of first vacuum machines and second vacuum machines, and the control module is electrically connected with the first vacuum machines and the second vacuum machines; the suction end of each first vacuum machine is connected with a first branch pipe and a second branch pipe; the low-pressure pipe and the constant-pressure pipe are both connected with the second vacuum machine; and each suction end of the vacuum baking box is provided with a pressure sensing module. The invention has the advantages of effectively reducing the loss of electric energy, avoiding environmental pollution and the like.
Description
Technical Field
The invention relates to a vacuum baking oven control system, in particular to a vacuum baking oven control system and a vacuum baking oven control method capable of supplying different negative pressure values.
Background
The electrolyte of the lithium battery is organic matter containing no water, the existence of water has great harm to the battery, can cause the battery to generate heat and explode, and in order to remove the water, vacuum baking is needed before the battery is injected and packaged. Usually, one vacuum machine is matched with one baking box, and a plurality of vacuum machines are required to be matched with a plurality of baking box systems. For the existing vacuum baking box system, all vacuum machines work in real time, and actually, all vacuum baking is not in real work, so that part of the vacuum machines run idle, and electric energy is wasted. Even if the vacuum machine is in a vacuum working state, the negative pressure is not reasonably configured or managed in the conventional control mode, and the vacuum machine running at full load still causes corresponding electric energy waste. Meanwhile, peculiar smell gas often overflows from a vacuum baking box in work, and is exhausted to the atmosphere through a pipeline, so that corresponding pollution is caused to the surrounding environment.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a vacuum baking box control system and a control method for different negative pressure values, which solve the problems that the power consumption is large because a vacuum baking box system cannot be reasonably configured in the prior art.
The invention is realized by the following technical scheme:
a vacuum baking box control system for different negative pressure values is further optimized and comprises a connecting pipeline and a plurality of vacuum baking boxes, wherein the connecting pipeline comprises a low-pressure pipe and a constant-pressure pipe, the outlet end of each vacuum baking box is connected with a first pipeline and a second pipeline, the first pipeline is provided with a first valve, the second pipeline is provided with a second valve, the vacuum baking boxes are connected with the inlet ends of the low-pressure pipe through the first pipeline, and the vacuum baking boxes are connected with the inlet ends of the constant-pressure pipe through the second pipeline;
the vacuum unit comprises a plurality of first vacuum machines and second vacuum machines, and the control module is electrically connected with the first vacuum machines and the second vacuum machines;
the suction end of each first vacuum machine is connected with a first branch pipe and a second branch pipe, the first branch pipe is provided with a third valve, the second branch pipe is provided with a fourth valve, the first vacuum machine can be connected with the outlet end of the low-pressure pipe through the first branch pipe, and the first vacuum machine can be connected with the outlet end of the constant-pressure pipe through the second branch pipe;
the low-pressure pipe and the constant-pressure pipe are both connected with the second vacuum machine;
every the exit end of vacuum baking box all is provided with pressure sensing module, pressure sensing module is connected with the control module electricity.
The vacuum baking box comprises a connecting pipeline and a plurality of vacuum baking boxes through preferred arrangement, wherein the connecting pipeline comprises a low-pressure pipe and a constant-pressure pipe, the outlet end of each vacuum baking box is connected with a first pipeline and a second pipeline, the number of the first pipelines and the number of the second pipelines are respectively in one-to-one correspondence with the number of the vacuum baking boxes, the vacuum baking boxes can be connected and communicated with the low-pressure pipe through the first pipelines, meanwhile, the vacuum baking boxes can be connected and communicated with the constant-pressure pipe through the second pipelines, the first pipelines are provided with first valves, the second pipelines are provided with second valves, namely, one vacuum baking box is correspondingly connected and communicated with the inlet ends of the low-pressure pipe and the constant-pressure pipe through the corresponding first pipelines and second pipelines, and the low-pressure pipe and the constant-pressure pipe can be connected with a plurality of vacuum baking boxes according to requirements;
the vacuum machine set also preferably comprises a vacuum machine set and a control module, wherein the vacuum machine set comprises a second vacuum machine and a plurality of first vacuum machines, the control module can be electrically connected with all the vacuum machines and the vacuum baking boxes of the vacuum machine set, the control module can control the first vacuum machine and the second vacuum machine to start or stop, the second vacuum machine is provided with two vacuum machines which can be respectively connected with a low-pressure pipe and a constant-pressure pipe, the suction end of the first vacuum machine is connected with a first branch pipe and a second branch pipe, the number of the first branch pipe and the number of the second branch pipe respectively correspond to the number of the first vacuum machine one by one, the first vacuum machine can be connected and communicated with the low-pressure pipe through the first branch pipe, meanwhile, the first vacuum machine can be connected and communicated with the constant-pressure pipe through the second branch pipe, the first branch pipe is provided with a third valve, the second branch pipe is provided with a fourth valve, namely, one first vacuum machine respectively passes through the corresponding first branch pipe and second branch pipe, the low-pressure pipe and the constant-pressure pipe are correspondingly connected and communicated with outlet ends of the low-pressure pipe and the constant-pressure pipe, and the low-pressure pipe and the constant-pressure pipe can be connected with a plurality of first vacuum machines according to requirements;
the outlet end of each vacuum baking box is provided with a pressure sensing module, the vacuum baking box can be opened due to the fact that the pressure sensing module is electrically connected with the control module, the first vacuum machine is controlled to be opened to work, the first valve and the third valve are communicated and opened, the second valve and the fourth valve are disconnected and closed, the vacuum baking box can be sequentially connected to the first vacuum machine through the first pipeline, the low-pressure pipe and the first branch pipe, the second vacuum machine on the low-pressure pipe can be controlled to be opened or not to be opened according to setting requirements, the vacuum machine is used for pumping when the second vacuum machine is opened, the pipeline is used for communicating when the second vacuum machine is not opened, and pumping operation on the vacuum baking box is achieved; after the first vacuum machine is started to work for a preset time, whether the negative pressure value in the vacuum baking box reaches an expected value or not is detected through the pressure sensing module, if the negative pressure value does not reach the expected value, the second vacuum machine is started through the control module, the second valve and the fourth valve are communicated and started, the second vacuum machine can sequentially pass through the second pipeline, the constant-pressure pipe and the second branch pipe to the first vacuum machine, the second vacuum machine on the low-pressure pipe is controlled to be started or not according to setting requirements, the vacuum machine is used for pumping when the second vacuum machine is started, the pipeline is used for communicating when the second vacuum machine is not started, the vacuum machine is used for pumping when the second vacuum machine is not started, the pumping is simultaneously carried out under the conditions of constant pressure and low pressure, and the pumping operation of the vacuum baking box is realized; when the expected value is reached, the first valve and the third valve are controlled to be opened and closed, the first vacuum machine and the second vacuum machine under the condition of low pressure are opened and closed, the operation of the first vacuum machine and the second vacuum machine under the condition of constant pressure is kept, and the rotating speed of the first vacuum machine and the rotating speed of the second vacuum machine are controlled to meet the negative pressure value after the first vacuum machine and the second vacuum machine work for the preset time under the condition of constant pressure so as to realize the pumping operation of the vacuum baking box; according to the negative pressure value detected by the pressure sensing module, one or more first vacuum machines and one or more second vacuum machines are connected under the conditions of low pressure or constant pressure through reasonable regulation and control of the control module, so that the vacuum baking box works at a corresponding rotating speed, the standard vacuum value is convenient to match, the vacuum baking box control system is reasonably configured, and the electric energy consumption of the system is effectively reduced.
Further preferably, still include air purifier, air purifier can set up respectively in on low-pressure pipe and the constant voltage pipe, be used for purifying the vacuum and toast the case.
Further preferably, the air purifier is provided with a suction end close to the second vacuum machine, and the air purifier is internally provided with multi-layer honeycomb-shaped activated carbon.
Through being provided with air purifier, this honeycomb activated carbon of staggered floor only in the preferred air purifier to can produce the peculiar smell gas that overflows with the vacuum oven during operation and filter through multilayer active carbon in air purifier, discharge to the atmosphere after in the second vacuum machine chamber, avoid gaseous peculiar smell that contains, still can adsorb the trace liquid that exists simultaneously, with the liquid content in the reduction gas, thereby satisfy environmental protection's demand.
Further preferably, the first vacuum machine and the second vacuum machine are both set to include multiple rotation speeds.
The first vacuum machine and the second vacuum machine are arranged to comprise multiple rotating speeds, different rotating speeds have different operation power consumptions, the first rotating speed and the second rotating speed can be optimized, the power consumed by the first rotating speed is larger than the power consumed by the second rotating speed, and if the pressure sensing module detects that the vacuum in the vacuum baking box does not reach a negative pressure value, the first vacuum machine and the second vacuum machine can be controlled to work at the first rotating speed through the control module; and when the pressure sensing module detects that vacuum in the vacuum baking box reaches a negative pressure value, the first vacuum machine and the second vacuum machine can be controlled by the control module to work at a second rotating speed, reasonable running power can be obtained by adjusting the first vacuum machine and the second vacuum machine, the requirement on the negative pressure of the vacuum baking box can be matched, and further reduction of electric energy consumption is facilitated.
Further preferably, the first vacuum machine is a screw type vacuum machine, and the second vacuum machine is a roots type vacuum machine.
Preferably, the first vacuum machine and the second vacuum machine are both connected with a circulating water tank, and the circulating water tank is connected with a water cooling machine and used for cooling the first vacuum machine and the second vacuum machine.
All be connected with circulation tank through setting up first vacuum machine and second vacuum machine, can connect different circulation tank respectively for first vacuum machine and second vacuum machine, also can connect same circulation tank, through connecting circulation tank, it is higher effectively to avoid the temperature rise that the vacuum machine produced in service, lead to the damage of vacuum machine, avoid influencing the vacuum effect, it is connected with the cold water machine to prefer to set up circulation tank simultaneously, supply the cooling water through the cold water machine and carry out the heat exchange between circulation tank and the vacuum machine, thereby can effectively avoid because the phenomenon production of stopping production is led to shutting down because of cutting off the water supply outward, effectively guarantee cooling effect and production efficiency.
Further preferably, two ends of the first valve, the second valve, the third valve and the fourth valve are respectively provided with a manual vacuum valve. Through the preferred both ends that set up first valve, the second valve, third valve and fourth valve all are connected with manual vacuum valve, thereby can be when first valve, the second valve, third valve and fourth valve exist the damage demand and change, through the manual vacuum valve disconnection closure with its both ends, with this pipeline of disconnection closure, in time change the valve of damage, can avoid influencing the normal operating of other pipeline simultaneously, the practicality of the device system has been improved, the device system operation effect has been ensured.
Preferably, the first valve, the second valve, the third valve and the fourth valve are all set as pneumatic vacuum valves, and the control module can be respectively electrically connected with the first valve, the second valve, the third valve and the fourth valve.
Further preferably, the control module further comprises a display module and an operation module, the display module is used for displaying the running states of the first vacuum machine and the second vacuum machine, and the operation module is used for adjusting a manual mode or an automatic mode.
The control module comprises a display module and an operation module through optimal setting, the display module can use a touch screen, a visual multi-language operation interface can be provided, the ready condition and the operation state of each vacuum machine in the vacuum unit, the recording information of the negative pressure value of each vacuum baking box, the real-time operation performance curve, the history record, the once alarm data and the like of each vacuum machine in the vacuum unit can be displayed through optimal setting, and the corresponding alarm data, such as faults and the like, can be recorded during alarming; the operation module can be preferably provided with a connection operation interface, control buttons or a touch display screen are arranged on the operation panel, and a man-machine exchange function of a manual mode or an automatic mode is provided, wherein the manual mode is preferably used when the equipment is debugged, and the automatic mode is used when the equipment is normally operated. In the automatic mode, the entire control system operates in an automatic manner. During debugging, the user can send out the instruction to control module through the operation on the operating panel, and control module receives user's operating command, according to user's operating command, controls at least one work or the stop work of first vacuum machine, second vacuum machine to when being convenient for the vacuum machine maintains, can make its stop work keep apart, other vacuum machines still can normally work, avoid influencing the normal clear of production, improve the practicality of the device system.
A control method of a vacuum baking box control system for different negative pressure values comprises the following steps:
the vacuum baking box is opened, when the first vacuum machine is controlled to be opened to work, the first valve and the third valve are communicated and opened, the second valve and the fourth valve are disconnected and closed, the vacuum baking box can sequentially pass through the first pipeline, the low-pressure pipe and the first branch pipe to the first vacuum machine, at the moment, the second vacuum machine on the low-pressure pipe can be controlled to be opened or not to be opened according to setting requirements, the vacuum machine is used for pumping when the vacuum baking box is opened, and the pipeline is used for communicating when the vacuum baking box is not opened;
after the first vacuum machine is started to work for a preset time, whether the negative pressure value in the vacuum baking box reaches an expected value or not is detected through the pressure sensing module, if the negative pressure value does not reach the expected value, the second vacuum machine is started through the control module, the second valve and the fourth valve are communicated and started, the second vacuum machine can sequentially pass through the second pipeline, the constant-pressure pipe and the second branch pipe to the first vacuum machine, the second vacuum machine on the constant-pressure pipe is also controlled to be started or not according to setting requirements at the moment, the vacuum machine is used for pumping when the second vacuum machine is started, the pipeline passage is used when the second vacuum machine is not started, and the constant-pressure pipe pipeline and the low-pressure pipe pipeline are used for pumping simultaneously;
when the preset value is reached, controlling the first valve and the third valve to be opened and closed, opening and closing the first vacuum machine and the second vacuum machine on the low-pressure pipeline, keeping the first vacuum machine and the second vacuum machine on the constant-pressure pipeline to operate, after the preset time is reached, controlling the first vacuum machine and the second vacuum machine to operate at a first rotating speed through the control module when the pressure sensing module detects that the preset value is not reached, and controlling the first vacuum machine and the second vacuum machine to operate at a second rotating speed if the preset value is reached; according to the negative pressure value detected by the pressure sensing module, one or more first vacuum machines and one or more second vacuum machines are connected to the low-pressure pipeline and the constant-pressure pipeline and are reasonably regulated and controlled by the control module to work at corresponding rotating speeds so as to match the standard vacuum value.
The invention has the following advantages and beneficial effects:
1. the invention provides a vacuum baking box control system capable of supplying different negative pressure values, which comprises a connecting pipeline and a plurality of vacuum baking boxes, wherein the connecting pipeline comprises a low-pressure pipe and a constant-pressure pipe, the outlet end of each vacuum baking box is connected with a first pipeline and a second pipeline, the first pipeline is provided with a first valve, the second pipeline is provided with a second valve, the vacuum baking boxes are connected with the inlet ends of the low-pressure pipe through the first pipeline, and the vacuum baking boxes are connected with the inlet ends of the constant-pressure pipe through the second pipeline; the vacuum unit comprises a plurality of first vacuum machines and second vacuum machines, and the control module is electrically connected with the first vacuum machines and the second vacuum machines; the suction end of each first vacuum machine is connected with a first branch pipe and a second branch pipe, the first branch pipe is provided with a third valve, the second branch pipe is provided with a fourth valve, the first vacuum machine can be connected with the outlet end of the low-pressure pipe through the first branch pipe, and the first vacuum machine can be connected with the outlet end of the constant-pressure pipe through the second branch pipe; the low-pressure pipe and the constant-pressure pipe are both connected with the second vacuum machine; the suction end of each vacuum baking box is provided with a pressure sensing module; the control system of the vacuum baking oven is reasonably configured, so that the electric energy consumption of the system is effectively reduced;
2. the invention also comprises an air purifier which can be respectively arranged on the low-pressure pipe and the constant-pressure pipe and is used for purifying the vacuum baking box; the air purifier is arranged close to a suction end of the second vacuum machine, and the air purifier is internally provided with a plurality of layers of honeycomb-shaped activated carbon; the first vacuum machine and the second vacuum machine are both set to have various rotating speeds; the first vacuum machine is set as a screw type vacuum machine, and the second vacuum machine is set as a Roots vacuum machine; the first vacuum machine and the second vacuum machine are both connected with a circulating water tank, and the circulating water tank is connected with a water chiller and used for cooling the first vacuum machine and the second vacuum machine; the peculiar smell and trace liquid generated during baking in the vacuum oven can be purified, and the environment is protected;
3. the two ends of the first valve, the second valve, the third valve and the fourth valve are respectively provided with a manual vacuum valve; the first valve, the second valve, the third valve and the fourth valve are all set as pneumatic vacuum valves, and the control module can be respectively and electrically connected with the first valve, the second valve, the third valve and the fourth valve; the control module further comprises a display module and an operation module, the display module is used for displaying the running states of the first vacuum machine and the second vacuum machine, and the operation module is used for adjusting a manual mode or an automatic mode; the normal operation of other pipeline lines is avoided being influenced, the practicability of the device system is improved, and the operation effect of the device system is guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a vacuum baking box, 11-a first pipeline, 12-a second pipeline, 13-a pressure sensing module, 2-a connecting pipeline, 21-a low-pressure pipe, 22-a constant-pressure pipe, 3-a vacuum unit, 31-a first vacuum machine, 32-a second vacuum machine, 33-a first branch pipe, 34-a second branch pipe, 4-a control module, 41-a display module, 42-an operation module, 5-an air purifier, 6-a circulating water tank, 61-a water cooling machine, 7-a first valve, 8-a second valve, 9-a third valve, 10-a fourth valve and 100-a manual vacuum valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
A vacuum baking box control system capable of supplying different negative pressure values comprises a connecting pipeline 2 and a plurality of vacuum baking boxes 1, wherein the connecting pipeline 2 comprises a low-pressure pipe 21 and a constant-pressure pipe 22, the outlet end of each vacuum baking box 1 is connected with a first pipeline 11 and a second pipeline 12, a first valve 7 is arranged on the first pipeline 11, a second valve 8 is arranged on the second pipeline 12, the vacuum baking boxes 1 are connected with the inlet ends of the low-pressure pipe 21 through the first pipeline 11, and the vacuum baking boxes 1 can be connected with the inlet ends of the constant-pressure pipe 22 through the second pipeline 12;
the vacuum machine set 3 comprises a plurality of first vacuum machines 31 and second vacuum machines 32, and the control module 4 is electrically connected with the first vacuum machines 31 and the second vacuum machines 32;
a first branch pipe 33 and a second branch pipe 34 are connected to the suction end of each first vacuum machine 31, a third valve 9 is arranged on the first branch pipe 33, a fourth valve 10 is arranged on the second branch pipe 34, the first vacuum machine 31 can be connected with the outlet end of the low-pressure pipe 21 through the first branch pipe 33, and the first vacuum machine 31 can be connected with the outlet end of the constant-pressure pipe 22 through the second branch pipe 34; the second vacuum machine 32 is connected to both the low-pressure pipe 21 and the constant-pressure pipe 22; the outlet end of each vacuum baking box 1 is provided with a pressure sensing module 13.
Example 2
The present embodiment is further improved based on embodiment 1, and further comprises an air purifier 5, wherein the air purifier 5 can be respectively disposed on the low pressure pipe 21 and the constant pressure pipe 22, and is used for purifying the vacuum baking oven 1; the air purifier 5 is arranged at a suction end close to the second vacuum machine 32, and the air purifier 5 is internally provided with a plurality of layers of honeycomb-shaped activated carbon; the first vacuum machine 31 and the second vacuum machine 32 are set to have various rotating speeds; the first vacuum machine 31 is a screw type vacuum machine, and the second vacuum machine 32 is a roots type vacuum machine; the first vacuum machine 31 and the second vacuum machine 32 are both connected with a circulating water tank 6, and the circulating water tank 6 is connected with a water cooling machine 61 and used for cooling the first vacuum machine 31 and the second vacuum machine 32.
Example 3
In this embodiment, based on a further improvement of embodiment 2, manual vacuum valves are disposed at two ends of the first valve 7, the second valve 8, the third valve 9, and the fourth valve 10; the first valve 7, the second valve 8, the third valve 9 and the fourth valve 10 are all set as pneumatic vacuum valves; the control module 4 further includes a display module 41 and an operation module 42, wherein the display module 41 is used for displaying the operation states of the first vacuum machine 31 and the second vacuum machine 32, and the operation module 42 is used for adjusting the manual mode or the automatic mode.
The principle and the effect are as follows: according to the control method, when the first vacuum machine 31 is controlled to be started to work, the first valve 7 and the third valve 9 are communicated and opened, the second valve 8 and the fourth valve 10 are disconnected and closed, the first vacuum machine 31 can be communicated with the first pipeline 11, the low-pressure pipe 21 and the first branch pipe 33 in sequence, at the moment, the second vacuum machine 32 on the low-pressure pipe 21 can be controlled to be started or not to be started according to setting requirements, the vacuum machine is used for pumping when the second vacuum machine is started, the pipeline passage is used when the second vacuum machine is not started, the pumping operation on the vacuum baking box 1 is realized, and meanwhile, the water cooler 61 is started to carry out circulating cooling on the first vacuum machine 31 and the second vacuum machine 32 through the circulating water tank 6;
after the first vacuum machine 31 is started to work for a preset time, whether the negative pressure value in the vacuum baking box 1 reaches an expected value or not is detected through the pressure sensing module 13, if the negative pressure value does not reach the expected value, the second vacuum machine 32 is started through the control module 4, the second valve 8 and the fourth valve 10 are communicated and started, the negative pressure value can sequentially pass through the second pipeline 12, the constant pressure pipe 22 and the second branch pipe 34 to the first vacuum machine 31, at the moment, the second vacuum machine 32 on the low pressure pipe 21 is also controlled to be started or not according to setting requirements, the vacuum machine is used for pumping when the second vacuum machine is started, the pipeline channel is used for pumping when the second vacuum machine is not started, the pumping is simultaneously performed under the conditions of constant pressure and low pressure, and the pumping operation of the vacuum baking box is realized;
when the expected value is reached, controlling the first valve 7 and the third valve 9 to be opened and closed, opening and closing the first vacuum machine 31 and the second vacuum machine 32 above and below the low-pressure pipe 21 and the constant-pressure pipe 22, keeping the first vacuum machine 31 and the second vacuum machine 32 of the constant-pressure pipe 22 to operate, under the constant-pressure condition, after the first vacuum machine 31 and the second vacuum machine 32 work for a preset time and the pressure sensing module 13 detects that the expected value is not reached, controlling the first vacuum machine 31 and the second vacuum machine 32 to operate at a first rotating speed through the control module 4, if the expected value is reached, controlling the first vacuum machine 31 and the second vacuum machine to operate at a second rotating speed, calculating the negative pressure value variable quantity in the vacuum baking box 1 according to the negative pressure value detected by the pressure sensing module 13, judging whether the variable quantity meets the requirement of the vacuum baking box 1 in the current working stage, if the current requirement is not met, according to the function relationship between the standard negative pressure value variable quantity and the operation power consumption, one or more first vacuum machines 31 and second vacuum machines 32 are connected under the low pressure or constant pressure condition through reasonable regulation and control selection of control module 4 for the whole operation consumption and the standard negative pressure numerical value change quantity phase-match of the vacuum unit 3 in work, effective rational configuration vacuum baking oven control system has effectively reduced the loss of electric energy.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The vacuum baking box control system capable of providing different negative pressure values is characterized by comprising a connecting pipeline (2) and a plurality of vacuum baking boxes (1), wherein the connecting pipeline (2) comprises a low-pressure pipe (21) and a constant-pressure pipe (22), the outlet end of each vacuum baking box (1) is connected with a first pipeline (11) and a second pipeline (12), the first pipeline (11) is provided with a first valve (7), the second pipeline (12) is provided with a second valve (8), the first pipeline (11) is used for connecting the vacuum baking boxes (1) with the inlet ends of the low-pressure pipe (21), and the second pipeline (12) is used for connecting the vacuum baking boxes (1) with the inlet ends of the constant-pressure pipe (22);
the device is characterized by further comprising a vacuum unit (3) and a control module (4), wherein the vacuum unit (3) comprises a plurality of first vacuum machines (31) and second vacuum machines (32), and the control module (4) is electrically connected with the first vacuum machines (31) and the second vacuum machines (32);
the suction end of each first vacuum machine (31) is connected with a first branch pipe (33) and a second branch pipe (34), a third valve (9) is arranged on the first branch pipe (33), a fourth valve (10) is arranged on the second branch pipe (34), the first vacuum machine (31) can be connected with the outlet end of the low-pressure pipe (21) through the first branch pipe (33), and the first vacuum machine (31) can be connected with the outlet end of the constant-pressure pipe (22) through the second branch pipe (34);
the low-pressure pipe (21) and the constant-pressure pipe (22) are both connected with the second vacuum machine (32);
every the exit end of vacuum baking case (1) all is provided with pressure sensing module (13), pressure sensing module (13) are connected with control module (4) electricity.
2. A vacuum oven control system for different negative pressure values according to claim 1, further comprising an air cleaner (5), said air cleaner (5) being respectively disposed on said low pressure pipe (21) and constant pressure pipe (22) for cleaning the vacuum oven (1).
3. The vacuum oven control system for different negative pressure values according to claim 2, characterized in that the air cleaner (5) is disposed near the suction end of the second vacuum machine (32), and the air cleaner (5) is disposed with multi-layered honeycomb activated carbon.
4. A vacuum oven system for different negative pressure values according to claim 1, wherein said first vacuum machine (31) and said second vacuum machine (32) are arranged to comprise a plurality of rotational speeds.
5. A vacuum oven control system for different negative pressure values according to claim 1, characterized in that said first vacuum machine (31) is configured as a screw vacuum machine and said second vacuum machine (32) is configured as a roots vacuum machine.
6. The vacuum oven control system for different negative pressure values according to claim 1, wherein the first vacuum machine (31) and the second vacuum machine (32) are both connected with a circulating water tank (6), and the circulating water tank (6) is connected with a water cooler (61) for cooling the first vacuum machine (31) and the second vacuum machine (32).
7. A vacuum oven control system for different negative pressure values according to claim 1, characterized in that the first valve (7), the second valve (8), the third valve (9) and the fourth valve (10) are provided with manual vacuum valves (100) at both ends.
8. A vacuum oven control system for different negative pressure values according to claim 1, characterized in that the first valve (7), the second valve (8), the third valve (9) and the fourth valve (10) are provided as pneumatic vacuum valves.
9. A vacuum oven control system for different negative pressure values according to claim 1, characterized in that the control module (4) further comprises a display module (41) and an operation module (42), the display module (41) is used for displaying the operation status of the first vacuum machine (31) and the second vacuum machine (32), and the operation module (42) is used for adjusting the manual mode or the automatic mode.
10. A control method of a control system of a vacuum oven for different negative pressure values according to any one of claims 1 to 9,
the vacuum baking box (1) is opened, when the first vacuum machine (31) is controlled to be opened and operated, the first valve (7) and the third valve (9) are communicated and opened, the second valve (8) and the fourth valve (10) are opened and closed, the first vacuum machine (31) can be sequentially connected with the first pipeline (11), the low-pressure pipe (21) and the first branch pipe (33), the second vacuum machine (32) on the low-pressure pipe (21) can be controlled to be opened or not opened according to setting requirements, the vacuum machine is used for pumping when the second vacuum machine is opened, and the pipeline passage is used when the second vacuum machine is not opened;
after a first vacuum machine (31) is started to work for a preset time, whether the negative pressure value in a vacuum baking box (1) reaches an expected value or not is detected through a pressure sensing module (13), if the negative pressure value does not reach the expected value, a second vacuum machine (32) is started through a control module (4), a second valve (8) and a fourth valve (10) are communicated and started, the second vacuum machine can sequentially pass through a second pipeline (12), a constant pressure pipe (22) and a second branch pipe (34) to the first vacuum machine (31), at the moment, the second vacuum machine on the constant pressure pipe (22) is also controlled to be started or not to be started according to setting requirements, the second vacuum machine is started to perform a vacuum machine suction effect, the constant pressure pipe (22) and a low pressure pipe (21) are started to work simultaneously;
when the preset value is reached, controlling the first valve (7) and the third valve (9) to be opened and closed, opening and closing the operation of the first vacuum machine (31) and the second vacuum machine (32) on the pipeline of the low-pressure pipe (21), keeping the operation of the first vacuum machine (31) and the second vacuum machine (32) on the pipeline of the constant-pressure pipe (22), after the preset time is reached, when the pressure sensing module (13) detects that the preset value is not reached, controlling the first vacuum machine (31) and the second vacuum machine (32) to operate at a first rotating speed through the control module (4), and if the preset value is reached, controlling the first vacuum machine (31) and the second vacuum machine (32) to operate at a second rotating speed; according to the negative pressure value detected by the pressure sensing module (13), one or more first vacuum machines (31) and one or more second vacuum machines (32) are connected to the pipeline of the low-pressure pipe (21) and the pipeline of the constant-pressure pipe (22) through reasonable regulation and control of the control module (4) and work at corresponding rotating speeds so as to match the standard vacuum value.
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